I had a thyroid scan which shows mild thyroid enlargement, possible cold nodule. I am hyperthyroid with a TSH of 800, normal T3, free T3, total T4 and elevated T4 of 2.1. I have tachycardia and taking a beta blocker. My iron and B-12 are low, I have had negative results for Pernicious Anemia, my hgb is also low. I do not have a follow-up appt. at this time. I had malignant melanoma removed 2 years ago with follow-ups every 6 months, which have been negative. What is your input with the above information related to my thyroid?